'\" t .TH menu_hook 3X "" .SH NAME \fBmenu_hook\fR - set hooks for automatic invocation by applications .SH SYNOPSIS \fB#include <menu.h>\fR .br int set_item_init(MENU *menu, void (*func)(MENU *)); .br void (*)(MENU *) item_init(MWNU *menu); .br int set_item_term(MENU *menu, void (*func)(MENU *)); .br void (*)(MENU *) item_term(MWNU *menu); .br int set_menu_init(MENU *menu, void (*func)(MENU *)); .br void (*)(MENU *) menu_init(MWNU *menu); .br int set_menu_term(MENU *menu, void (*func)(MENU *)); .br void (*)(MENU *) menu_term(MWNU *menu); .br .SH DESCRIPTION These functions make it possible to set hook functions to be called at various points in the automatic processing of input event codes by \fBmenu_driver\fR. The function \fBset_item_init\fR sets a hook to be called at menu-post time and each time the selected item changes (after the change). \fBitem_init\fR returns the current item init hook, if any (\fBNULL\fR if there is no such hook). The function \fBset_item_term\fR sets a hook to be called at menu-unpost time and each time the selected item changes (before the change). \fBitem_term\fR returns the current item term hook, if any (\fBNULL\fR if there is no such hook). The function \fBset_menu_init\fR sets a hook to be called at menu-post time and just after the top row on the menu changes once it is posted. \fBmenu_init\fR returns the current menu init hook, if any (\fBNULL\fR if there is no such hook). The function \fBset_menu_term\fR sets a hook to be called at menu-unpost time and just before the top row on the menu changes once it is posted. \fBmenu_term\fR returns the current menu term hook, if any (\fBNULL\fR if there is no such hook). .SH RETURN VALUE Routines that return pointers return \fBNULL\fR on error. Other routines return one of the following: .TP 5 \fBE_OK\fR The routine succeeded. .TP 5 \fBE_SYSTEM_ERROR\fR System error occurred (see \fBerrno\fR). .SH SEE ALSO \fBcurses\fR(3X), \fBmenu\fR(3X). .SH NOTES The header file \fB<menu.h>\fR automatically includes the header file \fB<curses.h>\fR. .SH PORTABILITY These routines emulate the System V menu library. They were not supported on Version 7 or BSD versions. .SH AUTHORS Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S. Raymond. .\"# .\"# The following sets edit modes for GNU EMACS .\"# Local Variables: .\"# mode:nroff .\"# fill-column:79 .\"# End: